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aeromorris05, "Bar Keepers Friend" the powder version, not the liquid is the only one that I know of that will not scratch, it is the only cleaner recommended for use on the premium All-Clad Cookware. But you will need to drain down a little to expose dry tiles, and it takes a lot of rubbing...

Re: Used Hydrogen Peroxide for Removing Metal Stains - Resul Swampwoman, A few additional comments. If you did get rid of scale, and as I mentioned it might take more than one AA and HP treatment, and if you do remove most of the sequestered iron by doing the HP only treatment at a pH of 7.3...

Re: Used Hydrogen Peroxide for Removing Metal Stains - Resul Swampwoman, I am sorry to read that iron came out of solution at a pH of 7.4. My own experience at 7.5, and a little higher, was that no iron came out of solution. It could be for one of the following reasons. 1. That you may not...

impala1ss, I think that it possible that the numbers supplied by your pool store could have been incorrect unless they were using a Taylor test kit, or the one used on this forum, and all the chemicals were still current. If using Taylors you can call their number, 1-800-837-8548, read out the...

Re: Used Hydrogen Peroxide for Removing Metal Stains - Resul Made a few additions and corrections to the above "The Hydrogen Peroxide and Ascorbic Acid Method - Operational Guide" Here they are: Interesting links on YouTube as to how it works: http://www.youtube.com/watch?v=qT3mJrmhJHU...

Re: Used Hydrogen Peroxide for Removing Metal Stains - Resul Swampwoman, It is good to read that you are happy with your results. Question did you do a final treatment at pH of 7.3 or 7.4? The reason for asking is that there may still be remaining chelated in iron sequestered to your "Jack's...

Re: Used Hydrogen Peroxide for Removing Metal Stains - Resul Swampwoman, Well I wish you all the best with the filter, I am not so lucky as ours is wind born. I think if there were iron in the sequestrant (chelated iron) we would have seen it with the high levels of chlorine we raised it to...

Re: Used Hydrogen Peroxide for Removing Metal Stains - Resul I re-wrote the instructions to make them clearer. Hope this helps. "The Hydrogen Peroxide and Ascorbic Acid Method - Operational Guide" I believe from personal experience and observation the two main advantages of using Hydrogen...

Re: Used Hydrogen Peroxide for Removing Metal Stains - Resul Swampwoman, Firstly, thank you for going to the expense and trouble of doing this treatment, and for being so good as to report back, so few people report back. I was glad to read that your HP and AA treatment went reasonably well...

Re: Used Hydrogen Peroxide for Removing Metal Stains - Resul chem geek, It seems I did both, albeit entirely by accident, by which I refer to two HP treatments, one at a pH of 7.3 and the next at 7.0 with no Ascorbic Acid. The other three were done with 1lb of Ascorbic Acid each time at a pH...

Re: Used Hydrogen Peroxide for Removing Metal Stains - Resul chem geek, Thank you for the reply that just came in. Thought this was interesting from "US Peroxide" company. It sort of re-states what you wrote that the iron has to be in a soluble form, for Hydrogen Peroxide to convert it into...

Re: Used Hydrogen Peroxide for Removing Metal Stains - Resul chem geek, An update, a link that might help, and four questions. It seems I must have measured the CyA incorrectly. I did indeed lose 30 ppm of CyA in the process going from 80 to 50. As you know I replaced the missing 30 ppm...

Re: Used Hydrogen Peroxide for Removing Metal Stains - Resul Swampwoman, See this post, spelt wrongly, "Phosphate Removal - Odd and Cheap Discovery?" posted: March 19th, 2013, 5:16 pm: http://www.troublefreepool.com/phospate-removal-odd-and-cheap-discovery-t56560.html Read Page 1 with chem...

Re: Used Hydrogen Peroxide for Removing Metal Stains - Resul chem geek, Update 1: The CyA must have been crystalized or something. I checked yesterday after adding 30 ppm, a few days ago, to the measured level of 50 ppm to up it to 80 ppm, well it read slightly over 100 ppm, my guess around...

Re: Used Hydrogen Peroxide for Removing Metal Stains - Resul Firstly my apologies I have been a little busy the last few days and have not looked at these posts. I would agree that the many posts I have written are not too clear as to the exact process required. I will put together an...

Re: Used Hydrogen Peroxide for Removing Metal Stains - Resul chem geek, In my never ending search for the perfect pool I did one more (last for many months I hope) "Hydrogen Peroxide and Ascorbic Acid Treatment", using 11 bottles of CVS's 32 oz 3% Hydrogen Peroxide (352 oz) put in as darkness...

Using the "PoolEquations" Excel spreadsheet I am trying to determine what would the "Calcium Carbonate Precipitation Potential" be if the numbers looked as follows: Cl 5 pH 7.3 TA 120 CH 475 CyA 80 Salt 3200 Borates 50 Orthophosphates 2000 (ppb) Temp at present 78F (to max 84F and an average...

Re: Used Hydrogen Peroxide for Removing Metal Stains - Resul chem geek, As promised I would reply on Thorium Nitrate 0.1% sequestrant test liquid. "Palintest" has still not replied but LaMotte on their website states it is good for 2 years not one. Also an update, the sequestrant level is...

Re: Used Hydrogen Peroxide for Removing Metal Stains - Resul chem geek, Thank you for the reply and apologies for my late response. I agree with your idea of waiting. It will also be interesting to see how long it now takes for iron stains to come back, hopefully a long time but we will see.

Re: Used Hydrogen Peroxide for Removing Metal Stains - Resul chem geek, Thank you for the reply. Would then using less lanthanum, very expensive here in Honolulu, with Hydrogen peroxide remove the same amount as using more lanthanum? Thank you.

Re: Used Hydrogen Peroxide for Removing Metal Stains - Resul chem geek, Thank you for the reply. Well it is good to know that the "Hydrogen Peroxide (HP) Method" in conjunction with the Ascorbic Acid (AA) Method, at a temperature of ideally lower than 70 F and no higher than 78 F, will work...

Re: Used Hydrogen Peroxide for Removing Metal Stains - Resul chemgeek, Early this morning I looked at my skimmer to see if it needed cleaning out. As I mainly use my suction side cleaner to clean the pool, unless it is windy which has not been for a few days, I look at it once or twice a...

Re: Used Hydrogen Peroxide for Removing Metal Stains - Resul chem geek, Thank you for the reply. I will try the borates but first I would like to order a borate test kit, although plaster does not look like it is pitting currently. I do have a new dog around 73 lbs but she never drinks from...

Re: Used Hydrogen Peroxide for Removing Metal Stains - Resul chem geek, Yes I did intend to write "raise" to -0.10 to -0.30. These are my present numbers (using Pool Calculator): Cl 4 pH 7.3 (to avoid iron staining and have -0.1 pH as reserve insurance) TA 80 CH 350 CyA 80 Salt 3200/3300...

Re: Used Hydrogen Peroxide for Removing Metal Stains - Resul chem geek, Thank you for all the effort you put into that reply and I agree with all the points you made. It is true that Hawaii is rather unusual because of its generally strong trade winds and volcanic iron soil and dust with some...

Re: Used Hydrogen Peroxide for Removing Metal Stains - Resul chem geek, Thank you for the reply. I changed the log to base 10, and as I am sure you know if you created that simple spreadsheet the phosphate numbers would have to exceed 117,000,000 ppb to create an issue; even I did not exceed...

Re: Used Hydrogen Peroxide for Removing Metal Stains - Resul chem geek, I agree with you on the subject of oxalate. The fact that I did have high levels of orthophosphate at an initial measurement of 35,000 ppb, some 3 or 4 months ago, when the sequestrant was kept at 10 ppm, for about a...

Re: Used Hydrogen Peroxide for Removing Metal Stains - Resul chem geek, I know "I'm like a dog with a bone" or perhaps a "A bad penny that keeps coming back." Anyway here I go again. First some housekeeping, I made corrections regarding the incorrect mention of "organic phosphates" when I...

Re: Used Hydrogen Peroxide for Removing Metal Stains - Resul chem geek, The following thought came to me. As this is the Deep End it is OK to come up with crazy thoughts, yes/no? Could it be that as I added Hydrogen Peroxide at night and regular Walmart bleach, an hour before sunrise, which...

Re: Used Hydrogen Peroxide for Removing Metal Stains - Resul chem geek, Did the Hydrogen Peroxide Method, one last time (at least for quite a while) last night the results were as follows: Chemistry of the pool was the same as before except temperature has risen to 77 F, organic phosphates...